12. e1d1  12... a7b6 [%c_highlight d1;keyPressed;none;opacity;0.8;square;d1;persistent;false] Supposedly Black has excellent compensation since White's king is not safe. 13. d1c2 [%c_effect c2;square;c2;type;Interesting;persistent;true] This is Nepomniachtchi's new idea, good enough for a rapid game. As often happens, no more than five minutes after the new move is played, opening experts from all over the world will come up with an antidote, but by then the novelty may have already borne fruit. 13... c6b4 A tempting move, sending the king to the strange b1-square. 14. c2b1 